Hi,
Several solutions:
- edit the files show.php and show_default.php of the view "product" via the menu Display>Views to move the description outside of the product page form. If you know PHP/HTML it shouldn't be a problem.
- install advanced modules manager pro on your website. It will add extra options to your modules, including options to display the module only for the product page, and / or only for some products so you'll be able to use a standard position of your template.
- install the extension modules anywhere and edit the file show.php to add the tag for that module outside of the form of the product page.